Stopping a DBA from calculating for one payroll

Hello,

What is the quickest way to stop a DBA from calculating for one payroll?  The enrollment is about 500 employees so overrides are not an option.  I thought by changing the Pay Period Calculations flags to 'N' for all 6 periods would accomplish this but it is a DBA with an 'enter amount/rate' that was enrolled thru Benefits so the EE DBA Instructions have the dollars and no stop date.  In my testing, the DBA continues.  Do I have to enter a stop date in DBA Instructions only and then remove it? Or is there another way? ( We are on 9.1).